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Fencer Intel
low 2.1

CVE-2014-8133 json

arch/x86/kernel/tls.c in the Thread Local Storage (TLS) implementation in the Linux kernel through 3.18.1 allows local users to bypass the…

published 2014-12-17 11 y ago modified 2026-06-17 4 mo ago also EUVD-2014-7976

cvss
2.1
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 48%
public exploits
0
none known

Summary

arch/x86/kernel/tls.c in the Thread Local Storage (TLS) implementation in the Linux kernel through 3.18.1 allows local users to bypass the espfix protection mechanism, and consequently makes it easier for local users to bypass the ASLR protection mechanism, via a crafted application that makes a set_thread_area system call and later reads a 16-bit value.

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 3.16.7-ckt4-1

debian advisories DEBIAN-CVE-2014-8133

  • linux Ubuntu 14.04 LTS 3.13.0-46.75
  • linux-lts-utopic Ubuntu 14.04 LTS 3.16.0-31.41~14.04.1

ubuntu advisories UBUNTU-CVE-2014-8133

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel RHEL 6 2.6.32-573.el6
  • perf RHEL 6 2.6.32-573.el6
  • python-perf RHEL 6 2.6.32-573.el6
  • kernel-kdump RHEL 6 2.6.32-573.el6
  • kernel-firmware RHEL 6 2.6.32-573.el6
  • kernel-bootwrapper RHEL 6 2.6.32-573.el6
  • kernel-abi-whitelists RHEL 6 2.6.32-573.el6
  • kernel-debuginfo-common-i686 RHEL 6 2.6.32-573.el6

red hat advisories RHSA-2015:1272

  • kernel-source openSUSE Tumbleweed 4.8.13-1.1

opensuse advisories openSUSE-SU-2024:10128-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2014-8133 updated cvss 1.9

kernel: x86: espfix(64) bypass via set_thread_area and CLONE_SETTLS

  • Red Hat Enterprise Linux 5 kernel
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux Desktop (v. 6) perf 2.6.32-573.el6, kernel 2.6.32-573.el6, kernel-firmware 2.6.32-573.el6, kernel-abi-whitelists 2.6.32-573.el6, kernel-debuginfo-common-i686 2.6.32-573.el6, kernel-debuginfo-common-x86_64 2.6.32-573.el6 Red Hat Enterprise Linux Desktop Optional (v. 6) python-perf 2.6.32-573.el6, kernel-debuginfo-common-i686 2.6.32-573.el6, kernel-debuginfo-common-x86_64 2.6.32-573.el6 Red Hat Enterprise Linux HPC Node (v. 6) perf 2.6.32-573.el6, kernel 2.6.32-573.el6, kernel-firmware 2.6.32-573.el6, kernel-abi-whitelists 2.6.32-573.el6, kernel-debuginfo-common-i686 2.6.32-573.el6, kernel-debuginfo-common-x86_64 2.6.32-573.el6 Red Hat Enterprise Linux HPC Node Optional (v. 6) python-perf 2.6.32-573.el6, kernel-debuginfo-common-x86_64 2.6.32-573.el6 Red Hat Enterprise Linux Server (v. 6) perf 2.6.32-573.el6, kernel 2.6.32-573.el6, kernel-kdump 2.6.32-573.el6, kernel-firmware 2.6.32-573.el6, kernel-bootwrapper 2.6.32-573.el6, kernel-abi-whitelists 2.6.32-573.el6, +4 more Red Hat Enterprise Linux Server Optional (v. 6) python-perf 2.6.32-573.el6, kernel-debuginfo-common-i686 2.6.32-573.el6, kernel-debuginfo-common-ppc64 2.6.32-573.el6, kernel-debuginfo-common-s390x 2.6.32-573.el6, kernel-debuginfo-common-x86_64 2.6.32-573.el6
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 6) perf 2.6.32-573.el6, kernel 2.6.32-573.el6, kernel-firmware 2.6.32-573.el6, kernel-abi-whitelists 2.6.32-573.el6, kernel-debuginfo-common-i686 2.6.32-573.el6, kernel-debuginfo-common-x86_64 2.6.32-573.el6 Red Hat Enterprise Linux Workstation Optional (v. 6) python-perf 2.6.32-573.el6, kernel-debuginfo-common-i686 2.6.32-573.el6, kernel-debuginfo-common-x86_64 2.6.32-573.el6
    fixed: vendor fix RHSA-2015:1272
  • Red Hat Enterprise Linux 7 perf, kernel, bpftool, python-perf, kernel-kdump, kernel-tools, +3 more Red Hat Enterprise MRG 2 kernel
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.58% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:N/I:P/A:N

Classification

Weakness
  • CWE-264 Permissions, Privileges, and Access Controls
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.